$9.6+5.8$
$-60-112$
$\frac{x^3-3x-2}{x+2}$
$\frac{9^2}{4}-ab+b^2$
$\int\frac{tan^2x}{sec^2x}dx$
$m^2+7m\:+10$
$cos^2\theta\:+\frac{1}{cos^2\theta\:}=2$
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